... helmet can be the rider's saving grace. This same type of full-face helmet with the rounded contour and the addition of proper insulation is designed for colder weather riding and typical of the snowmobile arenas. Some manufacturers offer these helmets with additional features, such as electric shields for warmth and anti-fogging lens systems for better visibility in the cold. AFX and Z1R both make snowmobile helmets with these options. For example the AFX FX-100 and the Z1R Phantom Snow Helmet are both offered with or without the electric shield but are standard equipped with a dual anti-fogging lens system ... well as providing a supportive structure for the inner foam liner. The shell is meant to compress and even break during impact to help disperse the blow to the liner and away from the skull. The shell is typically constructed of polycarbonate plastic or fiberglass. There are some higher end helmets that are constructed using a lightweight carbon fiber or Kevlar. Most of the foam liners are made of a material called Expandable Polystyrene Foam (EPS) that would crumble into pieces if exposed to contact and abrasion with the pavement or other hard surfaces but is second to none for compressing ...
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